| 摘要 |
<p>The control knobs are fitted in a panel (1) with a number of circular openings (3), one for each control knob. The knobs are held in place by elastic flexible clips (14) that engage with the edge of the opening. The clips are distributed round the periphery of the control knob. The clips run on the rear surface of the panel (1), and lie approximately perpendicular to the axis of rotation of the control knob. The control knob has a friction surface formed by supplementary tabs (13) distributed around the knob and co-operating with the edge of the opening in the panel.</p> |
